<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
  import BScroll from 'better-scroll'

  export default {
    name: "Scroll",
    props:{
      probeType:{
        type:Number,
        default:0
      },
      pullUpLoad:{
        type: Boolean,
        default: false
      }
    },
    data(){
      return {
        scroll:null,
      }
    },
    mounted() {
      //1.创建BScroll对象
      this.scroll = new BScroll(this.$refs.wrapper,{
        click:true,
        probeType:this.probeType,
        pullUpLoad: this.pullUpLoad
      })
      //2.监听滚动给的位置
      if(this.probeType === 2 || this.probeType === 3){
        this.scroll.on('scroll',(position) => {
          this.$emit('scroll',position);
        })
      }

      //3.监听上拉事件
      if(this.pullUpLoad){
        this.scroll.on('pullingUp',() => {
          this.$emit('pullingUp')
        })
      }
    },
    methods:{
      scrollTo(x,y,time=300){
        this.scroll &&  this.scroll.scrollTo(x,y,time);
      },
      finishPullUp(){
        this.scroll.finishPullUp();
      },
      refresh(){
        this.scroll && this.scroll.refresh();
      },
      getScrollY(){
        return this.scroll ? this.scroll.y : 0;
      }
    }
  }
</script>

<style scoped>

</style>
